Thermodynamics and General Relativity

This category examines specified thermodynamic models in relativistic spacetime, with explicit geometric, material and statistical assumptions. The pages introduce local fluid quantities, reference normalization, units, currents and balance laws before addressing restricted dissipative models and stationary thermal settings. Selected constructions include supported heat transport, regulated gravitational canonical preparations, static spherical fluid models and carefully delimited horizon or detector interpretations. Each preparation, constitutive choice and identification of a mathematical quantity with temperature or entropy is stated as part of its physical setting.

Geometric conservation identities and mathematical state constructions are supplied by the companion mathematics category and earlier prerequisites. Their physical use retains the conditions on observers, domains, smoothness, boundary exchange and material response. Stationary descriptions, local balance models and finite regulated systems have distinct scopes, which the pages preserve when drawing conclusions. Radiation and horizon discussions likewise distinguish the constructed field or detector model from an additional thermodynamic interpretation. Examples clarify reference choices and applicability boundaries without asserting a universal theory of gravitational entropy, arbitrary dissipative matter or removal of a regulator.